Pneumatic roll.



Patented Noi/126, 1912.

' C. G. SHOOP.

PNEUMATIC ROLL. APPLICATION FILED DB0. 6 1,045,201

CHARLES GUY SHOOP, F IBEJOIT, WISCONSIN, ASSIGN'OR TO C. MATTISON MACHINE WORKS, or BELOIT, WISCONSIN, A conrOnATION OF WISCONSIN.

PNEUNIATIC BOLL.

` of air between the collars Vit desirable to heat Be it known that I, CILIRLESIGdI-'Y1l SHooP, a 'citizen of the United States, residing at Beloit, in the county ofRock andl State of Wisconsln, have invented certain new and useful Improvements in Pneumatic Rolls, of which the following is a specification.

IThis invention relates to a pneumatic roll to be used on sanding machines, ordinarily called Sanders, for the purpose of carrying and cushioning an abrasive surface and to be used in smoothing variously shaped pieces of wood or other substances.

rlhe object of the invention is to produce a means by which the pneumatic casing of the roll may be conveniently and effectively hermetically sealed to the ends of the roll and by which the protective covering may be held in place. M

ln the accompanying drawings, Figure l is a central section of a roll embodying the features of my invention, and Fig. 2 is an end view of the roll.

The pneumatic roll comprises a shaft l with a collar 2 mounted near each end. The collars are rigidly attached to the shafts in such a manner as to prevent the passage and the shaft. shaft and fasl have found They may be placed on the tened by any suitable means.

them to contract tightly upon the shaft. l have used in thisembodiment of my invention a exible pneumatic casing 3, comprising an inner tube d of rubber, to prevent the escape of air through the casing and to more perfectly seal the points of contact of the casing with the collars, and an outer tube 5 of leather, to act as a protection to the rubber. @ther equivalent material, however, may lbe used for the purposes. collars has a radially projecting annular flange 6 on its inner side. The peripheral surface of each of the flanges tapers as shown at 7, the tapers converging out# wardly. Encircling each collar, spaced somewhat from the dange, is an inner ring 8. The peripheral surface of each ring tapers as shown at 9, the tapers `conyerging inwardly. The outer diameter of each ring is substantially equal to the outer diameter of the flange. Encircling both the flange of and the adjacent inner ring is 'an Outer ring l0. rEhe inner surface of the outer ring tapers from each edge to the specification of Letters retent. Application led December 6, 1911.

and

them and then allow Each of the Patented Nov. 26, 1912. Serial No. 664,18?.

l' center, both tapers `converging toward the centerof the ring as indicated at 11 and 12. The.- inner surface of the outer ring thus conforms tothe outer surfaces of the flange the inner ring. Screws 13 passing through the inner ringand threaded into the flange pressing the outer ring and the flange closely together for the purpose hereinafter set forth.

In assembling the roll the ringsl are removed; each vend of the over one of the collars; the outer rings are then passed over the ends of the casing, and the inner rings screwed to the anges, the inner and outer diameters, respectively, of these parts being such as to allow su@- cient space `between the parts to admit the walls of the casing. rlhe inner ring and the flange are then pressed together by means of the screws., lilie taper on the inner ring pressing the wall of the casing against the taper on the outer ring forces the outer ring and the flange together with the wall of the casing between, liermetically sealingv the casing., Compressed air into the casing through ordinary valve 14 and the tube l5 to which it is attached.

The casing 3 may be made either barrelshape or cylindrical, according to the objects to be sanded, and the amount of air conipressed in the casing may be varied to suit particular work.v rlhe roll may be used on any form of belt sander by using it as an idler belt pulley, and having 'the outer surface of the belt coated with abrasive inaterial, holding the object to be sanded against the belt where it passes over the roll. The casing forni-s a yielding, cushion for the belt to pass over, and allows the belt to readily adapt itself to the inany shapes that cannot be successfully handled by -an other method except hand'worlr. llhen partly in fiated, lthe belt readily conforms to any rounded or oval shape, and iiated, itforms a barrel-shape cushion to take care vof hollow cr concave surfaces. lt may also be used without a belt by applying the abrasivematerial directly to the surface of the casing and suitable means. rlliese casings have usually been attached to the collars by passing the walls of the casing outside of and down over the outer ends of the collars, fastening the ends of the casings with Wire or strings.

casing is passed may be conducted when fully indriving the roll by any This presents a very untidy appearance, the

casing is easily injured Where it passes over the'edge of the collar, and the projecting ends arelikely to cause trouble by flying out because of the very high speeds which are necessary., My method of attaching the caslng ends is very strong and durable, 4and presents a neat appearance. The casmg's are also very easily and quickly attached or removed. ,It is necessary only to remove the a flexible casing, each` end of said casing extending over one of said collars, a ring encircling each end of said casing and the adjacent collar, means for compressing the ends of said casing bet-Ween said rings and collars respectively, and means for conducting compressed air into saidcasing.

2. In a pneumatic roll, a shaft, a collar "hermetically mounted on said shaft near each end thereof, a flexible tubular casing, each end of said casing extending over one of said collars, an outer ring encircling each end of said casing, an inne-r ring inside of each endof'said casing adjacent said collar,

/means for hermetically clamping together said rings, said collar, and the Walls of the respective ends of said casing, and means for conducting compressed air into said casing.

3. In a pneumatic roll, a shaft, t-wo collars 4rigidly and hermetically mounted on said shaft and spaced a substantial distance from each other, an annular flange on each of said collars projecting radially, an inner ring encircling each collar adjacent said flange, an outer ring inclosing each of said flanges and said inner rings, a flexible tubular casing, the walls of each end of said casing extending between said outer ring and the flange and inner ring, means for hermeticall clamping said ends to said rings and anges, and means for conducting compressed air 'into said casing.

4. In a pneumatic roll, a shaft, two'col- H lars rigidly and hermetically mounted on said shaft spaced a substantial distance from feach other; radially extending annular flanges on the inner ends of said collars, the peripheries of said flanges tapering and converging outwardly; inner rlngs encirclin' said collars outside of and adjacent lsai flanges, but spaced therefrom, the peripheries of saidrmgs tapering and` converging inwardly; outer rings encircling each of said flanges andyinner rings, the inner surface of said outer rings conforming to the outer surfaces of said flanges and inner rings; a casing, the walls of each of the ends of said casing extendin bet-'Ween one of said 'outer rings and the adjacent flange and inner ring; means for pressing together said inner rings and said flanges, whereby each of said outer rings and the adjacent flange are pressed together causing the Walls of said casing to be hermeticall sealed to said flanges, and means for con ucting and retaining compressed air in said casing.

5. In a pneumatic. roll, a pair of end mem-- bers spaced apart and having tapering peripheries, a pair of rings encircling said end members and being coact with the tapered'end members,a flexible tubular casing cling said endmembers and lying within said rings, said rings 'being wedged on ,said end members to clamp t-he respective ends of said 'casing between the rings and end members, and means for holding said rings Ln such wedging position on said Vend inemers.

6. In a pneumatic', roll, a pair of end members spaced apart; an elongated flexi- -internally tapered to having its ends encirble tubular casmg consisting of an inner v tube of rubber and an outer tube of wearresisting material; two .rings each encircling one of said end members, the ends o f both of said tubes lying bet-Ween said end members and said rings, and said rings acting to clamp both of said tubes to said end members; means vfor securing saidl rings in such encircling and clamping position; and compressed-air inlet means connected to one of said end members.

In testimony whereof I aix my signature in the presence of two witnesses.

j CHARLES GUY snoor.- Witnesses:

M. ENELSON, E. M. IRISH.' 

